EP 0261700 B1 19900530 - PROCESS FOR EXTRACTING PARAFFINS FROM THEIR MIXTURES WITH PARRAFFINSULPHONIC ACIDS
Title (en)
PROCESS FOR EXTRACTING PARAFFINS FROM THEIR MIXTURES WITH PARRAFFINSULPHONIC ACIDS
Publication
Application
Priority
IT 2122486 A 19860723
Abstract (en)
[origin: EP0261700A1] Mixtures of C12-C18 n-paraffins with paraffinsulphonic acids having the same number of carbon atoms, water and sulphuric acid, and obtained by sulphoxidation of said paraffins with SO2 and O2 in the presence of water and UV radiation are stripped of their excess SO2 and decanted to separate most of the paraffins. and obtain a residual mixture. The residual mixture is fed with sulphuric acid until a two-phase system forms or at least until the mixture becomes turbid, and the turbid mixture or that floating on the heavy water-sulphuric acid phase is extraced with supercritical CO2, which removes with it the paraffins, which can be reused in the sulphoxidation process.
IPC 1-7
IPC 8 full level
C07C 7/148 (2006.01); B01D 11/04 (2006.01); C07B 63/00 (2006.01); C07C 1/00 (2006.01); C07C 7/10 (2006.01); C07C 9/15 (2006.01); C07C 9/22 (2006.01); C07C 67/00 (2006.01); C07C 301/00 (2006.01); C07C 303/14 (2006.01); C07C 303/42 (2006.01); C07C 303/44 (2006.01); C07C 309/04 (2006.01); C10G 21/06 (2006.01); C10G 73/02 (2006.01); C10G 73/06 (2006.01); C10G 73/38 (2006.01); C11D 3/34 (2006.01)
CPC (source: EP US)
B01D 11/0407 (2013.01 - EP US); C07C 303/42 (2013.01 - EP US); Y02P 20/54 (2015.11 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR LI LU NL SE
DOCDB simple family (publication)
EP 0261700 A1 19880330; EP 0261700 B1 19900530; AT E53201 T1 19900615; BR 8704129 A 19880412; CA 1296357 C 19920225; CN 1010583 B 19901128; CN 87105311 A 19880420; CS 272776 B2 19910212; CS 557087 A2 19900613; DD 261369 A5 19881026; DE 3762966 D1 19900705; DK 166020 B 19930301; DK 166020 C 19930712; DK 379587 A 19880124; DK 379587 D0 19870721; ES 2016616 B3 19901116; GR 3000633 T3 19910927; IN 169788 B 19911221; IN 169789 B 19911221; IT 1213456 B 19891220; IT 8621224 A0 19860723; JP H07110818 B2 19951129; JP S6339850 A 19880220; MX 168847 B 19930611; NO 165492 B 19901112; NO 165492 C 19910220; NO 873056 D0 19870721; NO 873056 L 19880125; PT 85389 A 19870801; PT 85389 B 19900430; RU 1771473 C 19921023; US 4843184 A 19890627; ZA 875103 B 19880118
DOCDB simple family (application)
EP 87201344 A 19870714; AT 87201344 T 19870714; BR 8704129 A 19870722; CA 542584 A 19870721; CN 87105311 A 19870723; CS 557087 A 19870723; DD 30525587 A 19870722; DE 3762966 T 19870714; DK 379587 A 19870721; ES 87201344 T 19870714; GR 900400442 T 19900706; IN 494MA1987 A 19870714; IN 495MA1987 A 19870714; IT 2122486 A 19860723; JP 18243487 A 19870723; MX 746787 A 19870722; NO 873056 A 19870721; PT 8538987 A 19870723; SU 4203002 A 19870722; US 7187287 A 19870710; ZA 875103 A 19870713